import { describe, it, expect, beforeEach, vi, Mock, afterEach } from 'vitest'
import { A2AClientAction } from '../../../src/main/presenter/A2APresenter/A2AClientAction'
import type { A2AMessageSendParams, A2AServerResponse } from '../../../src/shared/presenter'

// Mock global fetch
global.fetch = vi.fn()

// Mock @a2a-js/sdk/client
vi.mock('@a2a-js/sdk/client', () => {
  const mockA2AClient = {
    getAgentCard: vi.fn(),
    sendMessage: vi.fn(),
    sendStreamingMessage: vi.fn()
  }

  return {
    A2AClient: vi.fn(() => mockA2AClient)
  }
})

describe('A2AClientAction Simple Tests', () => {
  let clientAction: A2AClientAction
  let mockFetch: Mock

  beforeEach(() => {
    vi.clearAllMocks()

    // Mock fetch
    mockFetch = vi.mocked(fetch)
    mockFetch.mockResolvedValue({
      ok: true,
      status: 200
    } as Response)

    clientAction = new A2AClientAction('https://example.com')
  })

  afterEach(() => {
    vi.restoreAllMocks()
  })

  describe('constructor', () => {
    it('should create an instance', () => {
      expect(clientAction).toBeInstanceOf(A2AClientAction)
    })

    it('should handle different URLs', () => {
      const client1 = new A2AClientAction('https://example.com')
      const client2 = new A2AClientAction('https://example.com/')
      const client3 = new A2AClientAction('https://example.com/.well-known/agent-card.json')

      expect(client1).toBeInstanceOf(A2AClientAction)
      expect(client2).toBeInstanceOf(A2AClientAction)
      expect(client3).toBeInstanceOf(A2AClientAction)
    })
  })

  describe('isConnected', () => {
    it('should return true when fetch is successful', async () => {
      mockFetch.mockResolvedValue({
        ok: true,
        status: 200
      } as Response)

      const result = await clientAction.isConnected()

      expect(result).toBe(true)
    })

    it('should return false when fetch fails', async () => {
      mockFetch.mockResolvedValue({
        ok: false,
        status: 404
      } as Response)

      const result = await clientAction.isConnected()

      expect(result).toBe(false)
    })

    it('should throw error on network issues', async () => {
      mockFetch.mockRejectedValue(new Error('Network error'))

      // Should throw error
      await expect(clientAction.isConnected()).rejects.toThrow('Network error')
    })
  })

  describe('URL handling', () => {
    it('should handle different URL formats', async () => {
      const testCases = [
        'https://example.com',
        'https://example.com/',
        'https://api.example.com',
        'https://api.example.com/'
      ]

      for (const url of testCases) {
        const client = new A2AClientAction(url)
        mockFetch.mockResolvedValue({
          ok: true,
          status: 200
        } as Response)

        const result = await client.isConnected()
        expect(result).toBe(true)
      }
    })
  })

  describe('Error handling', () => {
    it('should throw connection errors', async () => {
      mockFetch.mockRejectedValue(new Error('Connection refused'))

      // Should throw
      await expect(clientAction.isConnected()).rejects.toThrow('Connection refused')
    })
  })
})
